﻿#ifndef CODEPAGE_HPP_7FE1DB9D_9D26_4A81_8F5B_8EFFF3A7B552
#define CODEPAGE_HPP_7FE1DB9D_9D26_4A81_8F5B_8EFFF3A7B552
#pragma once

/*
codepage.hpp
*/
/*
Copyright © 2024 Far Group
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
3. The name of the authors may not be used to endorse or promote products
   derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

// Internal:

// Platform:

// Common:

// External:

//----------------------------------------------------------------------------

namespace encoding::codepage
{
	namespace detail
	{
		struct utf8 { [[nodiscard]] static uintptr_t id(); };
		struct ansi { [[nodiscard]] static uintptr_t id(); };
		struct oem  { [[nodiscard]] static uintptr_t id(); };
	}

	[[nodiscard]] inline uintptr_t utf8() { return detail::utf8::id(); }
	[[nodiscard]] inline uintptr_t ansi() { return detail::ansi::id(); }
	[[nodiscard]] inline uintptr_t oem()  { return detail::oem::id(); }

	[[nodiscard]] uintptr_t normalise(uintptr_t Codepage);
}

// TODO: namespace

struct cp_info
{
	string Name;
	unsigned char MaxCharSize;
};

using cp_map = std::unordered_map<unsigned, cp_info>;

[[nodiscard]] const cp_map& InstalledCodepages();

[[nodiscard]] cp_info const* GetCodePageInfo(uintptr_t cp);
[[nodiscard]] bool IsCodePageSupported(uintptr_t CodePage, size_t MaxCharSize = static_cast<size_t>(-1));

[[nodiscard]] bool IsVirtualCodePage(uintptr_t cp);
[[nodiscard]] bool IsUtf16CodePage(uintptr_t cp);
[[nodiscard]] bool IsStandardCodePage(uintptr_t cp);
[[nodiscard]] bool IsUtfCodePage(uintptr_t cp);

[[nodiscard]] string ShortReadableCodepageName(uintptr_t cp);

#endif // CODEPAGE_HPP_7FE1DB9D_9D26_4A81_8F5B_8EFFF3A7B552
